Journal
OPTICS EXPRESS
Volume 24, Issue 2, Pages 1573-1586Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.24.001573
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Funding
- Baden-Wurttemberg Stiftung gGmbH
- European Research Council (ERC Starting Grant 'EnTeraPIC') [280145]
- Alfried Krupp von Bohlen und Halbach Foundation
- Karlsruhe School of Optics & Photonics (KSOP)
- Helmholtz International Research School for Teratronics (HIRST)
- Karlsruhe Nano-Micro Facility (KNMF)
- Deutsche Forschungsgemeinschaft
- Open Access Publishing Fund of Karlsruhe Institute of Technology
- European Research Council (ERC) [280145] Funding Source: European Research Council (ERC)
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Miniaturized integrated optical coherence tomography (OCT) systems have the potential to unlock a wide range of both medical and industrial applications. This applies in particular to multi-channel OCT schemes, where scalability and low cost per channel are important, to endoscopic implementations with stringent size demands, and to mechanically robust units for industrial applications. We demonstrate that fully integrated OCT systems can be realized using the state-of-the-art silicon photonic device portfolio. We present two different implementations integrated on a silicon-on-insulator (SOI) photonic chip, one with an integrated reference path (OCTint) for imaging objects in distances of 5 mm to 10 mm from the chip edge, and another one with an external reference path (OCText) for use with conventional scan heads. Both OCT systems use integrated photodiodes and an external swept-frequency source. In our proof-of-concept experiments, we achieve a sensitivity of -64 dB (-53 dB for OCTint) and a dynamic range of 60 dB (53 dB for OCTint). The viability of the concept is demonstrated by imaging of biological and technical objects. (C) 2016 Optical Society of America
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